Correlative tomography of an exceptionally preserved Jurassic ammonite implies hyponome-propelled swimming

Article Paleontology

Failed prey or peculiar necrolysis? Isolated ammonite soft body from the Late Jurassic of Eichstatt (Germany) with complete digestive tract and male reproductive organs

Christian Klug et al.

Summary: The study documents the soft parts of an ammonite from Germany and suggests that the soft tissues were separated from the shell taphonomically or during a failed predation event. The find adds to the knowledge of ammonite anatomy and provides insight into the reproductive organs.

SWISS JOURNAL OF PALAEONTOLOGY (2021)

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Article Multidisciplinary Sciences

New evidence from exceptionally well-preserved specimens sheds light on the structure of the ammonite brachial crown

C. P. A. Smith et al.

Summary: Researchers use tomographic data and topological data analysis to reveal the nature of mysterious hook-like structures in Late Cretaceous ammonites, confirming them as part of the brachial crown. This suggests that hooks have at least three independent evolutionary origins in ammonites.

SCIENTIFIC REPORTS (2021)

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Article Paleontology

Ammonoid soft tissue remains revealed by computed tomography

R. Hoffmann et al.

Summary: Soft tissue remains of ammonoids are rare compared to their abundant fossilized shells. Using computed-tomography, researchers identified well-preserved soft tissue remains in Early Cretaceous fossils from NE-Germany. Chemical analyses showed that the soft tissues are phosphatized and composed of fluorapatite.

SWISS JOURNAL OF PALAEONTOLOGY (2021)

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Article Biology